Efficient gas-liquid distribution device of absorption tower for making acid from copper smelting flue gas

Abstract

The utility model discloses an efficient gas-liquid distribution device of a copper smelting flue gas acid-making absorption tower, which comprises a tower body, a gas inlet is arranged on one side of the bottom of the tower body, a flue gas uniform distribution plate is fixedly arranged on the inner wall of the bottom of the tower body and above the gas inlet, and a plurality of packing layers are sequentially and fixedly arranged on the inner wall of the tower body and above the flue gas uniform distribution plate. Spraying pipes are fixedly arranged on the inner wall of the tower body above and below the packing layer, spraying heads are evenly distributed on the spraying pipes, a spiral-flow type distribution assembly is fixedly arranged on the inner wall of the tower body above the packing layer, a demister is fixedly arranged on the inner wall of the top of the tower body close to the top of the tower body and above the spiral-flow type distribution assembly, and an air outlet is formed in the top of the tower body. The air outlet is communicated with a fan through a pipeline. Through the arrangement of the flue gas uniform distribution plate, the packing layer and the spiral-flow type distribution assembly, flue gas is uniformly distributed in the tower body, the contact area of the flue gas and spraying liquid is increased, the purification efficiency of dirt in the flue gas is improved, and meanwhile, blockage of the packing layer caused by accumulation of the flue gas is also avoided.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, specifically to a high-efficiency gas-liquid distribution device for a copper smelting flue gas acid absorption tower. Background Technology

[0002] In the traditional copper smelting flue gas sulfuric acid production process, the absorption tower is a key piece of equipment, and its performance directly affects the flue gas purification efficiency and the quality of sulfuric acid production. However, existing absorption tower technologies suffer from a series of problems that limit their efficient operation.

[0003] First, the flue gas often distributes unevenly after entering the tower, resulting in excessively high concentrations in some areas and sparse concentrations in others. This uneven distribution prevents the absorbent liquid in some areas from fully contacting the flue gas, leading to incomplete absorption and affecting overall purification efficiency. Second, the packing layer, as a crucial site for gas-liquid contact, is frequently clogged by dust deposits. This not only reduces the packing layer's ventilation performance but also necessitates frequent tower shutdowns for cleaning, severely impacting production efficiency and stable equipment operation. Third, copper smelting flue gas contains highly corrosive media. Prolonged exposure to these media can easily cause perforation in the tower, increasing maintenance difficulty and costs, and posing serious safety hazards.

[0004] In addition, the excessively large droplet size is also a prominent problem in existing technologies. Large droplets have a short residence time within the tower, resulting in limited contact area with the flue gas and low gas-liquid mass transfer efficiency, further affecting the flue gas purification effect.

[0005] To address the shortcomings of the existing technology, this utility model proposes a high-efficiency gas-liquid distribution device for an acid absorption tower made from copper smelting flue gas. The aim is to improve the operating efficiency and purification effect of the absorption tower by optimizing the tower structure, improving the flue gas distribution, enhancing the ventilation performance of the packing layer, strengthening the corrosion resistance of the tower, and optimizing the particle size of the spray droplets. Utility Model Content

[0006] This utility model provides a high-efficiency gas-liquid distribution device for an acid absorption tower for copper smelting flue gas. The purpose is to improve the uniform distribution of flue gas in the tower body, enhance the air circulation efficiency of the packing layer, improve the resistance of the tower material to corrosive media, and adjust the spray state through a series of innovative structural designs, so as to improve the overall operating efficiency and purification quality of the absorption tower and solve the problems existing in the background technology.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] A high-efficiency gas-liquid distribution device for an acid absorption tower for copper smelting flue gas includes a tower body. An air inlet is located on one side of the bottom of the tower body. A flue gas distribution plate is fixedly installed on the inner wall of the bottom of the tower body above the air inlet. Several packing layers are sequentially fixed on the inner wall of the tower body above the flue gas distribution plate. Spray pipes are fixedly installed above and below the packing layers on the inner wall of the tower body, with spray heads evenly distributed on the spray pipes. A swirl distribution component is fixedly installed on the inner wall of the tower body above the packing layers. The swirl distribution component is located near the top of the tower body. A demister is fixedly installed on the inner wall of the top of the tower body above the swirl distribution component. An air outlet is located at the top of the tower body, and the air outlet is connected to a fan via a pipe.

[0009] Preferably, a water storage tank is provided on the inner wall of the bottom of the tower body, and a water outlet is provided on one side of the water storage tank. The water outlet is connected to a purification tank through a pipe. A circulation pump is provided on one side of the purification tank. The input end of the circulation pump is connected to the purification tank through a pipe, and the output end of the circulation pump is connected to a spray pipe through a pipe.

[0010] Preferably, the flue gas distribution plate includes upper and lower fixed plates, and a plurality of air inlet pipes are connected between the fixed plates.

[0011] Preferably, the swirl distribution component includes a support plate with a plurality of mounting through holes, and a helical blade is rotatably connected within the mounting through holes.

[0012] Preferably, the inner diameter of the mounting through hole decreases sequentially from top to bottom.

[0013] Preferably, the filler layer is a composite of a honeycomb filler layer and a corrugated filler layer.

[0014] Preferably, the spray head is a fan-shaped nozzle, and each spray head is connected to an intelligent control system, with the nozzle angle adjustable in the range of 30°-90°.

[0015] Preferably, the upper end of the air intake pipe is provided with a bevel on the fixed plate.

[0016] Preferably, the inner wall of the tower is lined with a lead-antimony alloy layer, and the outside is covered with a fiberglass reinforcement layer.

[0017] Preferably, the tower body sections are connected by flanges.

[0018] This utility model has the following beneficial effects:

[0019] (1) By setting up a flue gas distribution plate, a packing layer and a swirl distribution component, the flue gas is evenly distributed in the tower body, which increases the contact area between the flue gas and the spray liquid, improves the purification efficiency of pollutants in the flue gas, and also avoids the accumulation of flue gas causing blockage of the packing layer.

[0020] (2) The spray head is connected to the intelligent control system. Its angle is adjustable from 30° to 90°. This setting allows the spray liquid to come into full contact with the gas. The spray angle is adjustable and can be adjusted according to the actual operating conditions to achieve the best spraying effect.

[0021] (3) The corrosion resistance of the tower body is enhanced by the lead-antimony alloy layer on the inner wall of the tower body; the overall strength of the tower body is improved by the fiberglass reinforcement layer on the outside; the tower body is connected by flanges in sections, which facilitates installation, disassembly and maintenance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the tower body of this utility model;

[0024] Figure 3 This is a schematic diagram of the flue gas distribution plate structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the swirl-type distribution component structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the filler layer structure of this utility model.

[0027] In the diagram, 1-tower body, 2-air inlet, 3-flue gas distribution plate, 4-packing layer, 5-spray pipe, 6-spray head, 7-demister, 8-fan, 9-water storage tank, 10-water outlet, 11-purification tank, 12-circulating pump, 13-air inlet pipe, 14-support plate, 15-installation through hole, 16-spiral blade, 17-honeycomb packing layer, 18-corrugated packing layer, 19-bevel, 20-lead-antimony alloy layer, 21-fiberglass reinforcement layer, 22-air outlet, 23-fixing plate. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] Example 1

[0030] A high-efficiency gas-liquid distribution device for an acid absorption tower for copper smelting flue gas, as shown in the attached figure. Figure 1-5As shown, the tower includes a tower body 1. An air inlet 2 is located on one side of the bottom of the tower body 1. A flue gas distribution plate 3 is fixedly installed on the inner wall of the bottom of the tower body 1 above the air inlet 2. Three layers of packing material 4 are sequentially fixed on the inner wall of the tower body 1 above the flue gas distribution plate 3. Spray pipes 5 are fixedly installed above and below the packing layers 4 on the inner wall of the tower body 1. Twelve spray nozzles 6 are evenly distributed on the spray pipes 5. A swirling distribution assembly is fixedly installed on the inner wall of the tower body 1 above the packing layers 4. The swirling distribution assembly is located near the top of the tower body 1. A demister 7 is fixedly installed on the inner wall of the top of the tower body 1. An air outlet 22 is opened at the top of the tower body 1. The air outlet 22 is connected to a fan 8 through a pipe. A water storage tank 9 is provided on the inner wall of the bottom of the tower body 1. A water outlet 10 is opened on one side of the water storage tank 9. The water outlet 10 is connected to a purification tank 11 through a pipe. A circulation pump 12 is provided on one side of the purification tank 11. The input end of the circulation pump 12 is connected to the purification tank 11 through a pipe. The output end of the circulation pump 12 is connected to the spray pipe 5 through a pipe, forming a spray liquid circulation channel.

[0031] It should be noted that the filler layer 4 is not limited to three layers and the spray head 6 is not limited to 12; the specific number is determined according to the actual production situation.

[0032] Specifically, the flue gas distribution plate 3 includes upper and lower fixed plates 23, and several air inlet pipes 13 are connected between the fixed plates 23. This arrangement helps the flue gas to be distributed more evenly into the tower body 1.

[0033] Specifically, the swirl distribution component includes a support plate 14, on which a plurality of mounting through holes 15 are provided. A spiral blade 16 is rotatably connected in the mounting through holes 15. Under the action of the mounting through holes 15 and the spiral blade 16, a uniformly distributed flue gas channel is formed. Under the combined action of the flue gas channel formed by the flue gas distribution plate 3 at the bottom, the flue gas is better distributed evenly in the tower body 1.

[0034] Furthermore, in order to achieve a better gas-liquid reaction channel, the packing layer 4 is composed of a honeycomb packing layer 17 and a corrugated packing layer 18.

[0035] Specifically, the spray head is a fan-shaped nozzle, and each spray head is connected to an intelligent control system. The spray head angle is adjustable from 30° to 90°. This setting allows the spray liquid to come into more full contact with the gas, and the spray angle is adjustable, so it can be adjusted according to the actual operating conditions to achieve the best spraying effect.

[0036] Furthermore, the inner wall of the tower body 1 is lined with a lead-antimony alloy layer 20, which enhances the corrosion resistance of the tower body 1; the outer surface is covered with a fiberglass reinforcing layer 21, which improves the overall strength of the tower body 1; the tower body 1 is connected in sections by flanges, which facilitates installation, disassembly and maintenance.

[0037] Example 2

[0038] As a further improvement to the above embodiments, the following technical solutions are provided: Figure 2 As shown, in order to enable the swirl distribution component to have the function of uniformly distributing flue gas while separating water mist and gas through the mounting through hole 15 and reducing the discharge of water mist to the gas outlet 22, the difference from the above embodiment is that the inner diameter of the mounting through hole 15 decreases from top to bottom. When the spiral blade 16 rotates, a swirl airflow is formed to achieve gas-liquid separation.

[0039] Example 3

[0040] As a further improvement to the above embodiments, the following technical solutions are provided: Figure 3 As shown, in order to allow the liquid after the reaction to enter the water storage tank 9 better, the upper end of the air inlet pipe 13 is provided with a bevel 19 on the fixed plate 23.

[0041] Work process

[0042] As attached Figure 1-5 As shown, firstly, flue gas enters the tower body 1 through the inlet 2. Under the action of the fan 8, it rises evenly after passing through the flue gas distribution plate 3. Upon reaching the spray section, the droplets sprayed from the spray heads 6 contact and absorb the pollutants in the flue gas. The flue gas that is not fully absorbed continues to rise, passing through the packing layer 4. The liquid in the packing layer 4 reacts fully with the pollutants in the flue gas. The remaining flue gas continues to rise and enters the area above the packing layer 4. The liquid sprayed at high speed from the spray heads 6 forms countless tiny droplets that react fully with the pollutants in the flue gas. The packing layer 4 consists of three layers, and 12 spray heads 6 are evenly distributed on the spray pipe 5 to achieve thorough cleaning of the pollutants in the flue gas. As the flue gas continues to rise after absorption, the water mist entrained in the flue gas falls downwards after passing through the swirl distribution component, achieving initial gas-liquid separation. The flue gas continues to rise and passes through the demister 7 to further remove the water mist. It is then discharged and dissipated through the outlet 22 under the action of the fan 8. During the reaction between the spray liquid and the flue gas, the spray liquid absorbs the pollutants and falls into the water storage tank 9. After initial purification in the water storage tank 9, it flows into the purification tank 11 from the outlet 10. The spray liquid that has undergone initial purification is further purified in the purification tank 11. The liquid in the purification tank 11 is connected to the spray pipe 5 through the circulation pump 12 to achieve the circulation of the spray liquid.

Claims

1. A high efficiency gas-liquid distribution device for a copper smelter off-gas acid absorption tower, characterized in that, The utility model relates to a tower body (1), the tower body (1) bottom one side is equipped with the air inlet (2), the tower body (1) bottom inner wall is located the air inlet (2) top and is equipped with the flue gas uniform distribution board (3), the tower body (1) inner wall is located the flue gas uniform distribution board (3) top and is equipped with a plurality of packing layer (4) in proper order, the packing layer (4) top, bottom is located the tower body (1) inner wall and is equipped with the spray pipe (5), the spray pipe (5) is uniformly provided with the shower head (6), the packing layer (4) top is located the tower body (1) inner wall and is equipped with the cyclone type distribution component, the cyclone type distribution component is close to the tower body (1) top, the cyclone type distribution component top is located the tower body (1) top inner wall and is equipped with the mist eliminator (7), the tower body (1) top is equipped with the air outlet (22), the air outlet (22) is connected with the fan (8) through pipeline.

2. The high efficiency gas-liquid distributor for a copper smelter off-gas acid absorption tower according to claim 1, characterized in that, The tower body (1) bottom inner wall is provided with a water storage tank (9), one side of the water storage tank (9) is provided with a water outlet (10), the water outlet (10) is connected with a purification tank (11) through a pipeline, one side of the purification tank (11) is provided with a circulating pump (12), the input end of the circulating pump (12) is connected with the purification tank (11) through a pipeline, and the output end of the circulating pump (12) is connected with the spray pipe (5) through a pipeline.

3. The high-efficiency gas-liquid distribution device for a copper smelter off-gas acid absorption tower according to claim 1, characterized in that, The flue gas uniform distribution board (3) comprises upper and lower fixed plates (23), and a plurality of air inlet pipes (13) are connected between the fixed plates (23).

4. The high efficiency gas-liquid distributor for a copper smelter acid plant off-gas absorption tower of claim 1, wherein, The cyclone type distribution component comprises a supporting plate (14), a plurality of mounting through holes (15) are formed in the supporting plate (14), and helical blades (16) are rotatably connected in the mounting through holes (15).

5. The high efficiency gas-liquid distributor for a copper smelter acid gas absorption tower according to claim 4, characterized in that, The inner diameter of the mounting through hole (15) gradually decreases from top to bottom.

6. The high efficiency gas-liquid distributor for a copper smelter acid gas absorption tower of claim 1, wherein, The packing layer (4) is composed of a honeycomb packing layer (17) and a corrugated packing layer (18).

7. The high efficiency gas-liquid distributor for a copper smelter acid gas absorption tower of claim 1, wherein, The spray head (6) is a fan-shaped nozzle, each spray head (6) is connected with an intelligent control system, and the angle of the spray head (6) can be adjusted in a range of 30°-90°.

8. The high efficiency gas-liquid distributor for a copper smelter acid gas absorption tower according to claim 3, characterized in that, A bevel (19) is arranged on the upper end of the air inlet pipe (13) and located on the fixed plate (23).

9. The high efficiency gas-liquid distributor for a copper smelter acid gas absorption tower of claim 1, wherein, The inner wall of the tower body (1) is lined with a lead-antimony alloy layer (20), and the outer part is coated with a glass steel reinforcing layer (21).

10. The high efficiency gas-liquid distributor for a copper smelter acid plant off-gas absorption tower of claim 1, wherein, The tower body (1) is connected in sections by flanges.

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